Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Standard Twist Knot Wire Bristle Material Carbon Steel Brush Dia 3 1/2 in Wire Dia 0.023 in Bristle Length 7/8 in Grit Not Applicable Overall Length 3 5/8 in Compatible Tool Type Right-Angle Grinder Color Silver Primary Material Application Carbon Steel Connector Type Threaded Hole Connector Size 5/8 In.-11 Operating Speed - Maximum 13 000 RPM Shank Length Not Applicable